こと つか.う つか.える 
() matter () thing () business
                                                                       
こと (n) (uk) thing, matter, fact, circumstances, business, reason, experience
ことがある (exp,v5r-i) (1) (uk) (something) has occurred, to have done (something), such a thing happened, (2) (uk) (something) happens on occasions, there are times when
ことによる (exp,v5r) (1) (uk) depending on the circumstances, (2) due to (with modifying verb)
じぎょう (n) project, enterprise, business, industry, operations
じぎょうしょ (n) plant, enterprise place, office
じけん (n) event, affair, incident, case, plot, trouble, scandal
じこ (n) (1) accident, incident, trouble, (2) circumstances, reasons
じご (n-adv,n-t) after-, post-, ex-
じこう (n) matter, item, facts
じじつ (n-adv,n) fact, truth, reality
じじつじょう (n,adj-no) (as a) matter of fact, actually, in reality
じじつむこん (n,adj-no) groundless, entirely contrary to fact
じしょう (n) event, phenomenon, matter
じじょう (n) circumstances, consideration, conditions, situation, reasons
じぜん (n,adj-no) prior, beforehand, in advance
じたい (n) situation, (present) state of affairs, circumstances
じてん (n) cyclopedia, encyclopedia
ことがら (n) matter, thing, affair, circumstance
じへん (n) accident, disaster, incident, uprising, emergency
じむ (n,adj-no) business, office work
じむいん (n) clerk
じむかん (n) administrative official, secretary, commissioner
じむきょく (n) secretariat, executive office
じむじかん (n) permanent vice-president, undersecretary, vice-minister
じむしつ (n) office
じむしょ (n) office
じむてき (adj-na) businesslike, practical
じむとうきょく (n) officials in charge
じゆう (n) reason, cause
じれい (n,adj-no) example, precedent, case
じれいしゅう (n) collection of cases, collection of instances

Links: KanjiDic: EDict : Wikimedia
Etymologies: 中文字譜 : 説文解字